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|
package main
import (
"encoding/base32"
"encoding/hex"
"fmt"
"io"
"io/ioutil"
"net/url"
"os"
"strings"
)
func escape(encoding string) {
switch {
case strings.HasPrefix("query", encoding):
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
os.Stdout.Write([]byte(url.QueryEscape(string(b))))
case strings.HasPrefix("hex", encoding):
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
os.Stdout.Write([]byte(hex.EncodeToString(b)))
default:
fmt.Fprintf(os.Stderr, "unknown escape encoding: %q\n", encoding)
os.Exit(2)
}
}
func unescape(encoding string) {
switch {
case strings.HasPrefix("query", encoding):
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
s, err := url.QueryUnescape(string(b))
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
os.Stdout.Write([]byte(s))
case strings.HasPrefix("b32", encoding):
d := base32.NewDecoder(base32.StdEncoding, os.Stdin)
io.Copy(os.Stdout, d)
default:
fmt.Fprintf(os.Stderr, "unknown unescape encoding: %q\n", encoding)
}
}
func main() {
if len(os.Args) != 3 {
fmt.Fprintf(os.Stderr, "expected two arguments: <mode> <encoding>: got %d\n", len(os.Args)-1)
os.Exit(2)
}
mode := os.Args[1]
switch {
case strings.HasPrefix("escape", mode):
escape(os.Args[2])
case strings.HasPrefix("unescape", mode) || strings.HasPrefix("decode", mode):
unescape(os.Args[2])
default:
fmt.Fprintf(os.Stderr, "unknown mode: %q\n", mode)
os.Exit(2)
}
}
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